Endoscope self-locking suction mechanism and endoscope

Abstract

The utility model relates to the technical field of medical instruments, in particular to an endoscope self-locking type suction mechanism and an endoscope. The mechanism comprises a suction valve main body, a valve body column, an elastic reset piece and a sealing piece, a suction cavity is formed in the suction valve body and provided with an inlet and an outlet. A hollow guide sleeve is arranged in the suction cavity, and at least one limiting groove and at least one guide groove are formed in the side wall of the hollow guide sleeve; one end of the valve body column is inserted into the hollow guide sleeve, at least one limiting protrusion is arranged on the column face of the valve body column, and any limiting protrusion has a first state of being inserted into one limiting groove and a second state of being inserted into one guide groove. The elastic reset piece is used for switching the limiting bulge between the first state and the second state and locking the limiting bulge in the first state or the second state; and the sealing piece is used for connecting and disconnecting the inlet and the outlet. According to the endoscope, the inlet and the outlet of the suction cavity can be locked in a connected state or a disconnected state, and use of the endoscope and proceeding of an operation are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an endoscope self-locking suction mechanism and an endoscope. Background Art

[0002] In the medical field, endoscopes are widely used to observe the body cavity for diagnosis or treatment. The endoscope is provided with an insertion portion and an operating portion for operating the insertion portion. A suction channel leading to a suction port at the front end thereof is provided in the insertion portion. The suction channel is connected to a suction button cap provided in the operating portion; an instrument channel suitable for the passage of inspection and treatment instruments such as forceps or the injection of cleaning water is provided in the endoscope. In order to make the insertion portion thinner, most of the instrument channels and suction channels are used together, and in this case, the suction channel and the instrument channel share a section of the channel. In addition to the suction channel, the suction valve body is also connected to a discharge channel leading to a negative pressure source such as a suction pump. By pressing the suction button cap, the suction channel and the discharge channel are connected and suction is performed from the suction port. When the pressing operation is released, the connection between the suction channel and the discharge channel is cut off and suction from the suction port is stopped. When the suction operation time is long, pressing the button cap for a long time will cause finger fatigue to the operator, and further affect whether the operator can successfully complete the operation. Utility Model Content

[0003] The first object of the utility model is to provide a self-locking suction mechanism for an endoscope, so as to solve the technical problem that the button cap of the endoscope in the prior art needs to be pressed for a long time when performing suction operation, thus causing inconvenience in operation.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An endoscope self-locking suction mechanism comprises a suction valve body, a valve body column, a sealing member and an elastic reset member, wherein the sealing member is arranged on the valve body column;

[0006] A suction chamber is provided in the suction valve body, and the suction chamber has an inlet and an outlet; a hollow guide sleeve is provided in the suction chamber, and at least one limit groove and at least one guide groove are provided on the side wall of the hollow guide sleeve; one end of the valve body column is inserted into the hollow guide sleeve, and at least one limit protrusion is provided on the cylindrical surface of the valve body column, and any one of the limit protrusions has a first state of being inserted into one of the limit grooves and a second state of being inserted into one of the guide grooves; the elastic reset member is used to convert the limit protrusion between the first state and the second state and lock it in the first state or the second state; the valve body column is configured to enable any one of the limit protrusions to switch between the first state and the second state when the valve body column is pressed and rotated, so that the sealing member connects and blocks the inlet and the outlet.

[0007] Furthermore, at least one group of limiting tooth groups is provided at one end of the hollow guide sleeve, and any group of the limiting tooth groups includes two connected first bevel teeth, and the tooth gap between the two first bevel teeth connected as one body forms a limiting groove; the limiting protrusion is arranged at one end close to the hollow guide sleeve as a bevel tooth structure adapted to the first bevel teeth.

[0008] Furthermore, the elastic return member is a compression spring or a disc spring.

[0009] Furthermore, a receiving groove is provided on the inner end surface of the suction chamber away from the hollow guide sleeve, and the elastic return member is arranged in the receiving groove; one end of the valve body column away from the hollow guide sleeve is inserted into the receiving groove and abuts against the elastic return member.

[0010] Furthermore, it also includes a button cap, one end of which is inserted into the hollow guide sleeve and can abut against the valve body column, and the other end of which is located outside the suction chamber;

[0011] At least one clamping block is arranged on the outer peripheral surface of the button cap, and any one of the clamping blocks is slidably arranged in one of the guide grooves.

[0012] Further, the button cap is a shell structure with one end open, and the open end of the button cap is inserted into the hollow guide sleeve; one end of the valve body column is inserted into the button cap;

[0013] The limiting grooves and the guide grooves are alternately arranged one by one along the circumference of the hollow guide sleeve; at least two pushing teeth are arranged on the end surface of the opening end of the button cap, and any one of the limiting grooves and any one of the guide grooves is respectively arranged corresponding to one of the pushing teeth; the pushing teeth are used to push the limiting protrusion to switch between the first state and the second state.

[0014] Furthermore, the number of the limiting grooves is the same as the number of the guiding grooves.

[0015] Furthermore, a partition is provided in the suction chamber, and the partition is located between the inlet and the outlet; a valve is provided on the partition, the valve body column passes through the valve, and there is a gap between the valve body column and the valve;

[0016] When the limiting protrusion is in a first state, the sealing member is spaced apart from the partition; when the limiting protrusion is in a second state, the sealing member abuts against the partition and blocks the gap between the valve and the valve body column.

[0017] Furthermore, a limiting ring groove is arranged on the cylindrical surface of the valve body column, the sealing member is arranged as a sealing ring, and the sealing member is clamped in the limiting ring groove.

[0018] The second object of the utility model is to provide an endoscope, comprising the endoscope self-locking suction mechanism described in any one of the above embodiments.

[0019] Beneficial effects of the utility model:

[0020] The utility model provides an endoscope self-locking suction mechanism, which comprises a suction valve body, a valve body column, a sealing member and an elastic reset member, wherein the sealing member is arranged on the valve body column;

[0021] A suction chamber is provided in the suction valve body, and the suction chamber has an inlet and an outlet; a hollow guide sleeve is provided in the suction chamber, and at least one limiting groove and at least one guide groove are provided on the side wall of the hollow guide sleeve; one end of the valve body column is inserted into the hollow guide sleeve, and at least one limiting protrusion is provided on the cylindrical surface of the valve body column, and any limiting protrusion has a first state of being inserted into a limiting groove and a second state of being inserted into a guide groove; the elastic reset member is used to convert the limiting protrusion between the first state and the second state and lock it in the first state or the second state; the valve body column is configured to enable any limiting protrusion to switch between the first state and the second state when the valve body column is pressed and rotated, so that the sealing member connects and blocks the inlet and outlet.

[0022] When the suction operation is required, the valve body column is pressed and rotated so that any one of the limiting protrusions is in the first state of being inserted into a limiting groove. At this time, the inlet and outlet of the suction chamber are connected, and the suction operation can be performed through the suction chamber; when the suction operation is not required, the valve body column is pressed and rotated so that any one of the limiting protrusions is in the second state of being inserted into a guide groove. At this time, the seal blocks the inlet and outlet of the suction chamber. The present application can lock the limiting protrusion in the limiting groove or the guide groove, so that the inlet and outlet of the suction chamber are kept in the connected state or the blocked state, so that the operator does not need to continuously press the valve body column during the suction operation, avoiding the problem of operator finger fatigue, and facilitating the use of the endoscope and the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1A front view of the self-locking suction mechanism of the endoscope provided in an embodiment of the utility model;

[0025] Figure 2 A side view of the self-locking suction mechanism of an endoscope provided in an embodiment of the utility model;

[0026] Figure 3 When the limiting protrusion is in the first state, Figure 2 A cross-sectional view at AA;

[0027] Figure 4 A schematic structural diagram of a hollow guide sleeve and a suction valve cover plate provided in an embodiment of the utility model;

[0028] Figure 5 A schematic diagram of the structure of the valve body column and the sealing member provided in the embodiment of the utility model;

[0029] Figure 6 A schematic structural diagram of a button cap provided by an embodiment of the utility model;

[0030] Figure 7 When the limiting protrusion is in the process of switching from the first state to the second state, Figure 2 A cross-sectional view at AA;

[0031] Figure 8 When the limiting protrusion is in the second state Figure 2 A cross-sectional view at AA;

[0032] Fig. 9 When the limiting protrusion is in the process of switching from the second state to the first state, Figure 2 Cross-sectional view at AA.

[0033] icon:

[0034] 1- suction valve body; 11- suction chamber; 111- inlet; 112- outlet; 12- hollow guide sleeve; 121- limit groove; 122- guide groove; 123- limit tooth group; 1231- first oblique tooth; 13- accommodating groove; 14- partition; 141- valve; 15- suction valve housing; 16- suction valve cover plate;

[0035] 2-valve body column; 21-limiting protrusion; 22-limiting ring groove;

[0036] 3- Seals;

[0037] 4- elastic reset member;

[0038] 5-button cap; 51-block; 52-push gear. DETAILED DESCRIPTION

[0039] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0041] It should be noted that in the description of the present invention, the terms "connection" and "installation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or connected through an intermediate medium; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] When performing suction operations with existing endoscopes, the operator is required to continuously press the button cap for a long time, which will cause finger fatigue to the operator and further affect whether the operator can successfully complete the operation.

[0043] Based on this, the utility model provides an endoscope self-locking suction mechanism, referring to Figures 1 to 3 The mechanism comprises a suction valve body 1, a valve body column 2, a sealing member 3 and an elastic reset member 4, wherein the sealing member 3 is arranged on the valve body column 2;

[0044] A suction chamber 11 is provided in the suction valve body 1, and the suction chamber 11 has an inlet 111 and an outlet 112; a hollow guide sleeve 12 is provided in the suction chamber 11, and at least one limiting groove 121 and at least one guide groove 122 are provided on the side wall of the hollow guide sleeve 12; one end of the valve body column 2 is inserted into the hollow guide sleeve 12, and at least one limiting protrusion 21 is provided on the cylindrical surface of the valve body column 2, and any limiting protrusion 21 has a first state of being inserted into a limiting groove 121 and a second state of being inserted into a guide groove 122; the elastic reset member 4 is used to convert the limiting protrusion 21 between the first state and the second state and lock it in the first state or the second state; the valve body column 2 is configured to enable any limiting protrusion 21 to switch between the first state and the second state when the valve body column 2 is pressed and rotated, so that the sealing member 3 connects and blocks the inlet 111 and the outlet 112.

[0045] When the suction operation is required, the valve body column 2 is pressed and rotated so that any one of the limiting protrusions 21 is in the first state of being inserted into a limiting groove 121. At this time, the inlet 111 and the outlet 112 of the suction chamber 11 are connected, and the suction operation can be performed through the suction chamber 11; when the suction operation is not required, the valve body column 2 is pressed and rotated so that any one of the limiting protrusions 21 is in the second state of being inserted into a guide groove 122. At this time, the seal 3 blocks the inlet 111 and the outlet 112 of the suction chamber 11. The present application can lock the limiting protrusion 21 in the limiting groove 121 or the guide groove 122, so that the inlet 111 and the outlet 112 of the suction chamber 11 remain in the connected state or the blocked state, so that the operator does not need to press continuously during the suction operation, avoiding the problem of operator finger fatigue, and facilitating the use of the endoscope and the operation.

[0046] In this embodiment, the suction valve body 1 includes a suction valve housing 15 with an opening at one end and a suction valve cover plate 16 covering the opening of the suction valve housing 15. The suction valve housing 15 and the suction valve cover plate 16 are connected to form a suction chamber 11. The side wall of the suction valve housing 15 is provided with an inlet 111 and an outlet 112 connected to the suction chamber 11. Figure 4 , a hollow guide sleeve 12 is provided on the inner end surface of the suction valve cover plate 16; optionally, the suction valve cover plate 16 and the hollow guide sleeve 12 are integrally formed. It should be noted that the suction valve cover plate 16 and the hollow guide sleeve 12 are not limited to being integrally formed, and can also be connected by other means, such as: glue connection, thread connection, welding and other connection methods; the suction valve housing 15 is also not limited to being integrally formed, and can also be connected by other means, such as: glue connection, thread connection, welding and other connection methods.

[0047] Reference Figure 4At least one set of limiting teeth 123 is provided at one end of the hollow guide sleeve 12, and any set of limiting teeth 123 includes two connected first oblique teeth 1231, and the tooth gap between the two first oblique teeth 1231 connected as one body forms a limiting groove 121; Figure 3 The end of the limiting protrusion 21 close to the hollow guide sleeve 12 is set to a helical tooth structure adapted to the first helical teeth 1231. When the limiting protrusion 21 is in the first state, the helical tooth structure at the end of the limiting protrusion 21 is inserted into the tooth gap between the two first helical teeth 1231.

[0048] Specifically, any first oblique tooth 1231 includes a straight tooth surface and an oblique tooth surface connected at an angle, wherein the straight tooth surface is substantially parallel to the axial direction of the valve body column 2; in a group of limiting tooth groups 123, the straight tooth surface of one first oblique tooth 1231 is connected to a side groove wall of an adjacent guide groove 122, and its oblique tooth surface is connected to the straight tooth surface of another first oblique tooth 1231; the oblique tooth surface of another first oblique tooth 1231 is connected to a side groove wall of an adjacent guide groove 122. Analyzing the above structure, of the two opposite side groove walls of each guide groove 122, one side groove wall is connected to the oblique tooth surface of the adjacent first oblique tooth 1231, and the other side groove wall is connected to the straight tooth surface of the adjacent first oblique tooth 1231; of the two side groove walls of each limiting groove 121, one side groove wall is the oblique tooth surface of a first oblique tooth 1231 in the limiting tooth group 123, and the other side groove wall is the straight tooth surface of another first oblique tooth 1231 in the limiting tooth group 123.

[0049] Furthermore, a partition 14 is provided in the suction chamber 11, and the partition 14 is located between the inlet 111 and the outlet 112; a valve 141 is provided on the partition 14, and the valve body column 2 passes through the valve 141, and there is a gap between the valve body column 2 and the valve 141;

[0050] When the limiting protrusion 21 is in the first state, the sealing member 3 is spaced apart from the partition 14, and the inlet 111 and the outlet 112 of the suction chamber 11 are connected through the gap between the valve body column 2 and the valve 141; when the limiting protrusion 21 is in the second state, the sealing member 3 abuts against the partition 14 and blocks the gap between the valve 141 and the valve body column 2, thereby blocking the inlet 111 and the outlet 112 of the suction chamber 11.

[0051] Reference Figure 5 A limiting ring groove 22 is provided on the cylindrical surface of the valve body column 2, and the seal 3 is provided as a sealing ring, and the seal 3 is clamped in the limiting ring groove 22. The above structure limits the relative position of the seal 3 and the valve body column 2, so that the seal 3 can move synchronously with the valve body column 2.

[0052] In this embodiment, the partition 14 divides the suction chamber 11 into two chambers, the outlet 112 is connected to one of the chambers, the hollow guide sleeve 12 and the limiting protrusion 21 on the valve body column 2 are located in the chamber connected to the outlet 112; the inlet 111 is connected to the other chamber, and the sealing member 3 is located in the chamber connected to the inlet 111. The distance between the bottom of the limiting groove 121 and the partition 14 is smaller than the distance between the bottom of the guide groove 122 and the partition 14, so when the limiting protrusion 21 abuts against the limiting groove 121, the sealing member 3 is spaced from the partition 14; and when the limiting protrusion 21 is located in the guide groove 122, the sealing member 3 can abut against the partition 14. It can be understood that the positions of the inlet 111 and the outlet 112 of the suction chamber 11 can be interchanged, and the interchange does not affect the use of the mechanism.

[0053] In other embodiments, the seal 3 and the hollow guide sleeve 12 can be arranged on the same side of the partition 14; in this embodiment, when the limiting protrusion 21 abuts against the limiting groove 121, the seal 3 can abut against the partition 14; and when the limiting protrusion 21 is located in the guide groove 122, the seal 3 is spaced from the partition 14.

[0054] Continue to refer to Figure 3 The two ends of the elastic return member 4 are respectively in contact with the valve body column 2 and the suction valve body 1. The elastic return member 4 is used to push the valve body column 2 and drive the limiting protrusion 21 to move toward the bottom of the limiting groove 121 or the bottom of the guide groove 122, thereby locking the limiting protrusion 21 in the first state or the second state.

[0055] Optionally, the elastic reset member 4 is a compression spring or a disc spring. In this embodiment, the elastic reset member 4 is arranged between the end of the valve body column 2 away from the hollow guide sleeve 12 and the inner end surface of the suction chamber 11.

[0056] On the basis of the above structure, a receiving groove 13 is provided on the inner end surface of the suction chamber 11 away from the hollow guide sleeve 12, and the elastic reset member 4 is provided in the receiving groove 13; one end of the valve body column 2 away from the hollow guide sleeve 12 is inserted into the receiving groove 13 and abuts against the elastic reset member 4. The elastic reset member 4 can exert an elastic force on the valve body column 2 to move toward the hollow guide sleeve 12, so that the limiting protrusion 21 on the valve body column 2 can be maintained in the first state or the second state.

[0057] In other embodiments, the elastic return member 4 may also be sleeved on the valve body column 2 and disposed between the partition plate 14 and the shoulder on the valve body column 2 .

[0058] Continue to refer to Figure 3 The endoscope self-locking suction mechanism provided in the present application also includes a button cap 5, one end of which is inserted into the hollow guide sleeve 12 and can abut against the valve body column 2, and the other end of the button cap 5 is located outside the suction chamber 11.

[0059] Please also read Figure 6 At least one block 51 is provided on the outer circumferential surface of the button cap 5, and any one of the blocks 51 is slidably disposed in a guide groove 122; through the sliding cooperation between the guide groove 122 and the block 51, the button cap 5 can only move along its own axial direction and can hardly rotate.

[0060] In the above embodiment, pressing the button cap 5 can cause the valve body column 2 to be indirectly pressed and passively rotated, so that the limiting protrusion 21 on the valve body column 2 switches between the first state and the second state. In this embodiment, the operator only needs to press the button cap 5 to switch the inlet 111 and the outlet 112 of the suction chamber 11 between the on state and the blocked state and lock them in the on state or the blocked state, which is convenient for the use of the endoscope and the operation.

[0061] In other embodiments, the button cap 5 may not be provided; in this embodiment, the valve body column 2 passes through the hollow guide sleeve 12, and one end of the valve body column 2 extends out of the suction chamber 11. The operator presses and rotates the end of the valve body column 2 extending out of the suction chamber 11, so that the limiting protrusion 21 on the valve body column 2 can be switched between the first state and the second state.

[0062] In the embodiment without the button cap 5, the operator needs to first press the valve body column 2 until the limiting protrusion 21 is out of the limiting groove 121 or the guide groove 122, and then rotate the valve body column 2, so that the limiting protrusion 21 on the valve body column 2 can be switched between the first state and the second state. For example, in the initial state, the limiting protrusion 21 on the valve body column 2 is in the first state of being inserted into a limiting groove 121, and now the limiting protrusion 21 needs to be switched from the first state to the second state; first, the operator needs to press the valve body column 2 and drive the limiting protrusion 21 to be out of the limiting groove 121, then, keep the pressing state and rotate the valve body column 2 until the limiting protrusion 21 on the valve body column 2 is aligned with the entrance of the guide groove 122, and finally, release the valve body column 2, and the valve body column 2 drives the limiting protrusion 21 to move toward the direction close to the bottom of the guide groove 122 under the push of the elastic reset member 4; through the above operation, the limiting protrusion 21 is switched from the first state to the second state.

[0063] As can be seen from the above, in the embodiment where the button cap 5 is provided, the operator only needs to press the button cap 5 to switch the state of the limiting protrusion 21; while in the embodiment where the button cap 5 is not provided, the operator needs to press and rotate the valve body column 2 to switch the state of the limiting protrusion 21. Therefore, the provision of the button cap 5 can simplify the operation process, realize one-handed operation, and can also realize automatic and precise alignment of the limiting protrusion 21 and the limiting groove 121 or the guide groove 122, and realize precise switching of the state of the limiting protrusion 21.

[0064] Reference Figure 3 and Figure 6 The button cap 5 is a shell structure with one end open, and the open end of the button cap 5 is inserted into the hollow guide sleeve 12; one end of the valve body column 2 is inserted into the button cap 5;

[0065] The limiting grooves 121 and the guide grooves 122 are arranged alternately one by one along the circumference of the hollow guide sleeve 12; at least two pushing teeth 52 are arranged on the end surface of the open end of the button cap 5, and any limiting groove 121 and any guide groove 122 are respectively arranged corresponding to a pushing tooth 52; the pushing tooth 52 is used to push the limiting protrusion 21 to switch between the first state and the second state. When in use, pressing the button cap 5 can drive the pushing tooth 52 to move to abut against the limiting protrusion 21; after the pushing tooth 52 abuts against the limiting protrusion 21, continuing to press the button cap 5 can push the limiting protrusion 21 to move and switch between the first state and the second state.

[0066] Specifically, Figure 3 Taking the shown orientation as an example, the upper end of the valve body column 2, the lower end of the button cap 5 and the hollow guide sleeve 12 are nested in sequence from the inside to the outside; at least one limiting protrusion 21 is circumferentially arranged on the upper edge of the cylindrical surface of the valve body column 2 below the button cap 5, and at least one limiting groove 121 and at least one guiding groove 122 are alternately arranged on the side wall of the hollow guide sleeve 12 along the circumferential direction, and the limiting protrusion 21 is inserted into a limiting groove 121 or a guiding groove 122 on the side away from the cylindrical surface of the valve body column 2; a plurality of pushing teeth 52 are circumferentially arranged on the upper edge of the end surface of the lower end of the button cap 5, and any limiting groove 121 and any guiding groove 122 are respectively arranged corresponding to a pushing tooth 52; in a corresponding set of limiting grooves 121 and pushing teeth 52, the tooth tip of the pushing tooth 52 is roughly located in the middle of the limiting groove 121; in a corresponding set of guiding grooves 122 and pushing teeth 52, the tooth tip of the pushing tooth 52 is roughly located in the middle of the corresponding guiding groove 122.

[0067] Analyzing the above structure, the push tooth 52 is located between the cylindrical surface of the valve body column 2 and the side wall of the hollow guide sleeve 12, and the push tooth 52 is located above the limiting protrusion 21. When the state of the limiting protrusion 21 needs to be switched, pressing the button cap 5 downward can drive the push tooth 52 to move downward, so that the push tooth 52 abuts against the limiting protrusion 21 in the corresponding limiting groove 121 or the guide groove 122 (specifically, the oblique tooth surface of the push tooth 52 abuts against the oblique tooth surface at the upper end of the limiting protrusion 21); then, continue to press the button cap 5, and the push tooth 52 continues to move downward until the limiting protrusion 21 in the corresponding limiting groove 121 or the guide groove 122 is pushed out; after the limiting protrusion 21 is pushed out from the limiting groove 121 or the guide groove 122, since there is no limiting protrusion 21, the limiting protrusion 21 is pushed out of the limiting groove 121 or the guide groove 122. Under the constraint of the positioning groove 121 or the guide groove 122, continue to press the button cap 5, and the limiting protrusion 21 will rotate along the axial direction of the valve body column 2 under the push of the oblique tooth surface of the push tooth 52; when the limiting protrusion 21 rotates until the oblique tooth surface on the limiting protrusion 21 contacts the oblique tooth surface of the adjacent first oblique tooth 1231, release the button cap 5, and the elastic reset member 4 pushes the valve body column 2 to move upward, thereby driving the limiting protrusion 21 to slide into the guide groove 122 or the limiting groove 121 along the oblique tooth surface of the first oblique tooth 1231; at this point, the switching of the state of the limiting protrusion 21 is completed.

[0068] On the basis of the above structure, the number of the limiting grooves 121 is the same as the number of the guide grooves 122. In this embodiment, the number of the pushing teeth 52 may be equal to the sum of the number of the limiting grooves 121 and the guide grooves 122. It can be understood that the number of the pushing teeth 52 has no direct relationship with the number of the limiting grooves 121 and the guide grooves 122, and the number of the pushing teeth 52 may also be more than the sum of the number of the limiting grooves 121 and the guide grooves 122.

[0069] For example, in this embodiment, the number of the limiting tooth groups 123 is four, thereby forming four limiting grooves 121, the number of the guide grooves 122, the limiting protrusions 21 and the clamping blocks 51 are all four, and the number of the pushing teeth 52 is eight; wherein the four limiting grooves 121 and the four guide grooves 122 are alternately arranged one by one along the circumference of the hollow guide sleeve 12, and after the open end of the button cap 5 is inserted into the hollow guide sleeve 12, the four clamping blocks 51 are slidably arranged in the four guide grooves 122 one by one. , and the tooth tip of each push tooth 52 is roughly located in the middle of the corresponding limiting groove 121 or the guide groove 122; one end of the valve body column 2 is inserted into the hollow guide sleeve 12 and inserted into the button cap 5, that is, the valve body column 2, the button cap 5 and the hollow guide sleeve 12 are nested in sequence from the inside to the outside and coaxially arranged; the four limiting protrusions 21 on the valve body column 2 are evenly distributed along the circumference of the valve body column 2, so that the four limiting protrusions 21 can be inserted into the four limiting grooves 121 or the four guide grooves 122 at the same time.

[0070] In this embodiment, each limiting groove 121 and each guiding groove 122 are arranged through the side wall of the hollow guide sleeve 12, one side of the limiting protrusion 21 is connected to the cylindrical surface of the valve body column 2, and the other side of the limiting protrusion 21 passes through the limiting groove 121 or the guiding groove 122 and is located on the outside of the hollow guide sleeve 12.

[0071] In other embodiments, each limiting groove 121 and each guiding groove 122 can also be recessed on the inner side of the hollow guide sleeve 12; in this embodiment, one side of the limiting protrusion 21 is connected to the cylindrical surface of the valve body column 2, and the other side of the limiting protrusion 21 is inserted into the limiting groove 121 or the guiding groove 122.

[0072] The operation process of the attraction mechanism provided by this application is described in detail below:

[0073] Reference Figure 3 , with the first state in which the four limiting protrusions 21 are respectively inserted into the four limiting grooves 121 (i.e., they are clamped between the tooth gaps of the limiting tooth group 123) as the initial state; in the initial state, the sealing member 3 and the partition plate 14 are spaced apart, and the inlet 111 and the outlet 112 of the suction chamber 11 are connected through the gap between the valve body column 2 and the valve 141; under the push of the elastic reset member 4, the four limiting protrusions 21 can be locked in the first state; at this time, the suction operation can be performed.

[0074] Reference Figure 7 When the suction operation is not needed, the button cap 5 is pressed and the push tooth 52 is driven to move, thereby pushing the limiting protrusion 21 out of the limiting groove 121; then, the button cap 5 is continued to be pressed down. Since the limiting protrusion 21 is not restricted by the limiting groove 121, the limiting protrusion 21 rotates along the axial direction of the valve body column 2 under the push of the bevel tooth surface of the push tooth 52. When the limiting protrusion 21 rotates to contact the bevel tooth surface of one of the first bevel teeth 1231, the button cap 5 is released. Under the push of the elastic reset member 4, the limiting protrusion 21 slides into the guide groove 122 and is locked in the second state.

[0075] Further references Figure 8 The valve body column 2 is reset under the push of the elastic reset member 4, thereby driving the limiting protrusion 21 to slide along the oblique tooth surface of one of the first oblique teeth 1231 into the guide groove 122, and the four limiting protrusions 21 are in the second state of being respectively inserted into the four guide grooves 122; at this time, the sealing member 3 abuts against the partition plate 14 and blocks the gap between the valve 141 and the valve body column 2, thereby blocking the inlet 111 and the outlet 112 of the suction chamber 11.

[0076] Reference Fig. 9 When it is necessary to switch the limiting protrusion 21 from the second state to the first state, repeat the above steps.

[0077] It should be noted that the initial state in the above description is a state specified for the convenience of description. In actual use, the second state in which the limiting protrusion 21 is inserted into the guide groove 122 is the normal state. In the normal state, the inlet 111 and the outlet 112 of the suction chamber 11 are in a blocked state, and the suction mechanism does not work; when the suction operation is required, the operator presses the button cap 5 to connect the inlet 111 and the outlet 112 of the suction chamber 11, so that the suction operation can be performed through the suction chamber 11.

[0078] The suction mechanism provided in the present application not only has a self-locking function, but also the operator only needs to press the button cap 5 to switch the inlet 111 and the outlet 112 of the suction chamber 11 between the on state and the blocked state and lock them in the on state or the blocked state, thereby realizing one-handed operation and facilitating the use of the endoscope and the performance of the operation; in addition, the present application also has the advantages of simple structure, easy installation and low cost, and is suitable for wide promotion and use.

[0079] A second aspect of the present application provides an endoscope, which includes the endoscope self-locking suction mechanism provided by any of the above embodiments. Therefore, it has at least the technical effects of any of the above embodiments, which will not be repeated here.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An endoscope self-locking suction mechanism, characterized in that: It comprises a suction valve body (1), a valve body column (2), a sealing member (3) and an elastic reset member (4), wherein the sealing member (3) is arranged on the valve body column (2); The suction valve body (1) is provided with a suction chamber (11), and the suction chamber (11) has an inlet (111) and an outlet (112); the suction chamber (11) is provided with a hollow guide sleeve (12), and the side wall of the hollow guide sleeve (12) is provided with at least one limiting groove (121) and at least one guiding groove (122); one end of the valve body column (2) is inserted into the hollow guide sleeve (12), and at least one limiting protrusion (21) is provided on the cylindrical surface of the valve body column (2), and any one of the limiting protrusions (21) has the function of inserting one of the limiting protrusions (21) into the valve body column (2). The valve body column (2) is configured to be in a first state in the positioning groove (121) and a second state in which the positioning groove (121) is inserted into one of the guide grooves (122); the elastic return member (4) is used to convert the limiting protrusion (21) between the first state and the second state and lock it in the first state or the second state; the valve body column (2) is configured to enable any one of the limiting protrusions (21) to switch between the first state and the second state when the valve body column (2) is pressed and rotated, so that the sealing member (3) connects and blocks the inlet (111) and the outlet (112).

2. The endoscope self-locking suction mechanism according to claim 1, characterized in that: At least one group of limiting tooth groups (123) is provided at one end of the hollow guide sleeve (12), and any group of the limiting tooth groups (123) includes two connected first oblique teeth (1231), and the tooth gap between the two first oblique teeth (1231) connected as one body forms a limiting groove (121); and the limiting protrusion (21) is arranged at one end close to the hollow guide sleeve (12) as an oblique tooth structure adapted to the first oblique teeth (1231).

3. The endoscope self-locking suction mechanism according to claim 1, characterized in that: The elastic reset element (4) is a compression spring or a disc spring.

4. The endoscope self-locking suction mechanism according to claim 3, characterized in that: An accommodating groove (13) is provided on the inner end surface of the suction chamber (11) away from the hollow guide sleeve (12), and the elastic return member (4) is arranged in the accommodating groove (13); one end of the valve body column (2) away from the hollow guide sleeve (12) is inserted into the accommodating groove (13) and abuts against the elastic return member (4).

5. The endoscope self-locking suction mechanism according to claim 2, characterized in that: It also includes a button cap (5), one end of which is inserted into the hollow guide sleeve (12) and can abut against the valve body column (2), and the other end of which is located outside the suction chamber (11); At least one clamping block (51) is arranged on the outer peripheral surface of the button cap (5), and any one of the clamping blocks (51) is slidably arranged in one of the guide grooves (122).

6. The endoscope self-locking suction mechanism according to claim 5, characterized in that: The button cap (5) is a shell structure with one end open, and the open end of the button cap (5) is inserted into the hollow guide sleeve (12); one end of the valve body column (2) is inserted into the button cap (5); The limiting grooves (121) and the guiding grooves (122) are arranged alternately one by one along the circumference of the hollow guide sleeve (12); at least two pushing teeth (52) are arranged on the end surface of the opening end of the button cap (5), and any one of the limiting grooves (121) and any one of the guiding grooves (122) are respectively arranged corresponding to one of the pushing teeth (52); the pushing teeth (52) are used to push the limiting protrusion (21) to switch between the first state and the second state.

7. The endoscope self-locking suction mechanism according to any one of claims 5 to 6, characterized in that: The number of the limiting grooves (121) and the number of the guiding grooves (122) are the same.

8. The endoscope self-locking suction mechanism according to any one of claims 1 to 6, characterized in that: A partition (14) is provided in the suction chamber (11), and the partition (14) is located between the inlet (111) and the outlet (112); a valve (141) is provided on the partition (14), and the valve body column (2) passes through the valve (141), and a gap is provided between the valve body column (2) and the valve (141); When the limiting protrusion (21) is in a first state, the sealing member (3) is spaced apart from the partition (14); when the limiting protrusion (21) is in a second state, the sealing member (3) abuts against the partition (14) and blocks the gap between the valve (141) and the valve body column (2).

9. The endoscope self-locking suction mechanism according to claim 8, characterized in that: A limiting ring groove (22) is provided on the cylindrical surface of the valve body column (2), the sealing member (3) is provided as a sealing ring, and the sealing member (3) is clamped in the limiting ring groove (22).

10. An endoscope, characterized in that: It comprises an endoscope self-locking suction mechanism as described in any one of claims 1 to 9.

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